The rear-wheel drive CLK-Class is comprised of two models: the CLK350 and the CLK550. The CLK350 is outfitted with a 268-hp 3.5-liter V6 engine, while the CLK550 gets a more powerful 382-hp 5.5-liter V8. Both engines are mated to a seven-speed automatic transmission with TouchShift manual shift control, and CLK550 models feature steering-wheel mounted shift paddles (optional on the CLK350). The CLK350 is equipped with 17-inch alloy wheels, leather upholstery and automatic climate control, while CLK550 models add a sport suspension, rear lip spoiler and 18-inch alloy wheels with performance tires. Standard safety features on all CLK-Class models include anti-lock disc brakes with brake assist, stability and traction control systems, front side-impact airbags, overhead curtain airbags for front and rear passengers (coupes only) and active anti-whiplash front head restraints. For 2009, the Mercedes-Benz CLK-Class carries over with minimal changes to standard equipment and available options. Heated front seats and a glovebox-mounted 6-disc CD changer with MP3 capability are now standard on all models.